<?php 

if( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

if( ! class_exists('ACF_Location_Post_Taxonomy') ) :

class ACF_Location_Post_Taxonomy extends ACF_Location {
	
	/**
	 * Initializes props.
	 *
	 * @date	5/03/2014
	 * @since	5.0.0
	 *
	 * @param	void
	 * @return	void
	 */
	public function initialize() {
		$this->name = 'post_taxonomy';
		$this->label = __( "Post Taxonomy", 'acf' );
		$this->category = 'post';
    	$this->object_type = 'post';
	}
	
	/**
	 * Matches the provided rule against the screen args returning a bool result.
	 *
	 * @date	9/4/20
	 * @since	5.9.0
	 *
	 * @param	array $rule The location rule.
	 * @param	array $screen The screen args.
	 * @param	array $field_group The field group settings.
	 * @return	bool
	 */
	public function match( $rule, $screen, $field_group ) {
		
		// Check screen args.
		if( isset($screen['post_id']) ) {
			$post_id = $screen['post_id'];
		} elseif( isset($screen['attachment_id']) ) {
			$post_id = $screen['attachment_id'];
		} else {
			return false;
		}
		
		// Get WP_Term from rule value.
		$term = acf_get_term( $rule['value'] );
		if( !$term || is_wp_error($term) ) {
			return false;
		}
		
		// Get terms connected to post.
		if( isset($screen['post_terms']) ) {
			$post_terms = acf_maybe_get( $screen['post_terms'], $term->taxonomy, array() );
		} else {
			$post_terms = wp_get_post_terms( $post_id, $term->taxonomy, array('fields' => 'ids') );
		}
		
		// If no post terms are found, and we are dealing with the "category" taxonomy, treat as default "Uncategorized" category.
		if( !$post_terms && $term->taxonomy == 'category' ) {
			$post_terms = array( 1 );
		}
		
		// Search $post_terms for a match.
		$result = ( in_array($term->term_id, $post_terms) || in_array($term->slug, $post_terms) );
		
		// Reverse result for "!=" operator.
        if( $rule['operator'] === '!=' ) {
        	return !$result;
        }
		return $result;
	}
	
	/**
	 * Returns an array of possible values for this rule type.
	 *
	 * @date	9/4/20
	 * @since	5.9.0
	 *
	 * @param	array $rule A location rule.
	 * @return	array
	 */
	public function get_values( $rule ) {
		return acf_get_taxonomy_terms();
	}
	
	/**
	 * Returns the object_subtype connected to this location.
	 *
	 * @date	1/4/20
	 * @since	5.9.0
	 *
	 * @param	array $rule A location rule.
	 * @return	string|array
	 */
	public function get_object_subtype( $rule ) {
		if( $rule['operator'] === '==' ) {
			$term = acf_decode_term( $rule['value'] );
			if( $term ) {
				$taxonomy = get_taxonomy( $term['taxonomy'] );
				if( $taxonomy ) {
					return $taxonomy->object_type;
				}
			}
		}
		return '';
	}
}

// initialize
acf_register_location_type( 'ACF_Location_Post_Taxonomy' );

endif; // class_exists check
